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We design this earphone to meet many customer's requirement, sometimes when you are driving, riding or running, even when you are swimming, you could still use our Bluetooth earphone to answer the phone or listen to music. Button Controls Power ON: Press and hold the multifunction button for 3 seconds Power Off: Press and hold the multifunction button for 3 seconds Play/Pause: Tap the multifunction button once Answer Phone Call: Tap the multifunction button once Hang Up: Tap the multifunction button once Reject Phone Call: Press and hold the multifunction button for seconds (There is detailed instruction and matters need attention in the manual) Features Model: M770 IN-EAR Color: Black Up to 12 Months Warranty Bluetooth Specification: 4.2+EDR Noise reduction: Noise Eliminate Technology Transmission distance: 39 ft /13 yd Product size: 19.5x12x18.5 mm Net weight: 4.5g /0.158oz Battery: lithium-ion polymer 70mAh Charging port: Micro USB Charging time: 1h Work time: 4-5h Standby time: 72h Accessories List: 1 X Waterproof Swimming Earbud 1 X USB to Micro USB charging cable 1 X User manual 1 X Sets of extra ear tips 1 X Sets of extra ear cushions 1 X Set of ear hooks 1 X Carrying case